(a) Referring to Table 2.11, what proportion of firms are in the category of having had an averag

(a) Referring to Table 2.11, what adjustment of firms are in the condition of having had an middle of at smallest 3.0 injuries per thousand worker-hours? (b) What percentage or firms were at or underneath an middle of 2.0 injuries per thousand worker-hours? Table 2.11 Relative Frequencies and Cumulative Proportions for Middle Reckon of InjuriesAverage reckon of injuriesper thousand worker-hoursNumber of firms(a) Relative quantity(b) Cumulative adjustment1.5–1.730.060.061.8–2.0120.240.302.1–2.3140.280.582.4–2.690.180.762.7–2.970.140.903.0–3.2550.101.00 Total50Total1.00